Mud-ring for boiler-furnaces



(No Model.)

P. F. DUNDON.

MUD RING FOR BOILER FURNACES.

- No. 247,545. r Patented Sept. 27,1881.

, NIT-ED STATES PATENT OFFICE.

PATRICK F. DUNDON, OF SAN FRANCISCO, CALIFORNIA.

MUD-RING FOR BOILER-FURNACES.

SPECIFICATION formingpart of Letters Patent No. 247,545, dated September 27, 1881.

Application filed February 26, 1881. (No model.)

To all whom it may concern:

Be it known that I, PATRICK F. DUNDON, of the city and county of San Francisco, State of California, have invented an Improved Mud- Ring for Boiler-Furnaces; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to that class of boilerfurnaces which have a double wall surrounding the fire-box, including an intervening waterspace; and it consists in a novel method of securing the frame or mud-ring which forms the floor or bottom of the water-space,whereby it may be easily removed for the purpose of cleaning the water-space or repairing whenever necessary in any case. The method of securing this frame at present is open to the objection that it prevents a thorough cleaning of the Water-space or making repairs, because of the difficulty of removing the frame and the necessity of cleaning and repairing by the old imperfect methods. The water-space between the walls needs to be cleaned out whenever there is too great a deposit of sediment. This is done through hand-holes near the bottom of the water-leg; but it is obvious that such a method is imperfect in its results. The manner in which the frame or mud-ring is fastened in the -water-leg-namely, by rivets passing through both plates which form the walls and horizontally through the mud-ring-makes a solid connection, so that the mud-ring cannot be taken out to allow the water-space to be cleaned, or to allow repair, unless the rivets are cut or driven out forcibly.

The object of my invention is to overcome this difficulty by fastening the mud-ring or frame between the walls of the water-leg in such a manner as to render it easy of removal when necessary to gain access to the waterspace.

Referring to the accompanying drawings, Figure 1 is a view of my boiler with a portion broken away, showing its construction. Figs. 2 and 3 are details of construction.

Let A represent the shell of the boiler. 13 B are the walls of the fire-box, inclosing the furnace, the interior of which is fitted in the manner usual to this class of furnaces. Between the walls B B is the water-space a. This space a is closed at the bottom by the frame or mud-ring D. The manner of securing this mud-ring to the bottom of the water-leg is in this case as follows: On its upper surface are formed the longitudinal grooves or channels 1), near the edges, as shown. These channels are to receive the bottoms or edges of the walls, and are deep enough to form a brace or support for the Walls fitting within them against the outward pressure.

In the mud-ring, between the grooves 12, are the holes 0, placedalternately on opposite sides, as shown. To the inner surfaces of the walls B B, and within the water-space a, are riveted the straps E, having their lower ends formed into screw-bolts, so as to pass through the holes 0 in the mud-ring. These straps are secured to the plates forming the walls of the waterleg, in positions corresponding to the holes 0 in the mud-rin g.

' When the mud-ring is fitted to the bottom of the walls the screw-bolt ends of the straps pass through the holes 0, and are secured underneath by nuts 0, as shown. By screwing up the nuts the n1ud=ring D and the walls B B will be drawn tightly together and form a floor or bottom for the water-space a. Any suitable packing-as lead, cement, rubber, asbestus, or hemp-may be used to make this joint watertight. This manner of connecting presents a neat appearance, nothing being seen from the outside but the heads of the rivets securing the straps to the plates of the walls, and the nuts 6 underneath securing the ends of the straps and supporting the mud-ring D. By unscrewing the nuts the mud-ring may be readily removed and replaced with as much facility.

It will be seen that the method of securing the mud-ring by means of thesevertical bolts may be altered by making the ring enough broader than the Width of the walls to allow the bolts to pass through it on the outside of the walls, instead of,loetween them. It may also be effected by'forming a flange at the foot of each of the walls, through which and the mud-ring the bolts may pass; or a strip of angle-iron may be secured around the foot of the walls, so as to fit upon the mud-ring,which will be secured by passing the bolts through the flange of this an gleiron and securing them by nuts, as before described but in most cases it will be found that the method first described will be preferable.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a boiler-furnace having the walls B B, inclosing the water-space (1., the frame or m udring D, with its grooves d fitting the lower edges of the plates of the walls, said mud-ring being secured to the walls by the screw-bolts E, passing down through holes in the mudring and secured by nuts, substantially as described.

2. In a boiler-furnace, the combination of the walls or shells A and B, having between them the water-space a, the grooved frame or mud-ring D, and the straps E, secured to the walls within the water-space a, and passing through the mud-ring and secured by nuts underneath, whereby the said frame or mud-ring 20 D may be easily removed when necessary, substantially as described.

8. The improvement in securing the mudring or bottom plate to the walls of fire-box furnaces, consisting in perforating the ring or plate with vertical holes, through which screwbolts E pass, having nuts by which the mudring is secured, said bolts being secured to the side of the water-leg, or passing throughflanges secured to said walls, substantially as de- 30 scribed.

In witness whereof I have hereunto set my hand.

PATRICK F. DUNDON.

\Vitnesses:

S. H. N OURSE, WM. F. BOOTH. 

